API 674 GB/T 9234-2008 Assembly type: horizontal or vertical.Transmission type: electric motor or diesel; There are 4 ways of speed regulation,ie: by gear box, belt wheel, electromagnetic or frequency-changing. Main parts:Pump body:(material used: HT250)Fluid cylinder body: (material used: 304ss,316ss,316L ss, 2205,1Cr18Ni9Ti, 420ss,4140,1045, Nickel-phosphorus ...